@BoneyM, on average, how much does it cost to hire a 3rd tier party of 6 adventurers? According to Renegade Crowns there's a bunch of ruins in the Border Princes of loads of different kinds, with about 39% of them being Arabyan or Khemri ruins (20% Arabyan, 19% Khemri). Lure of the Liche Lord gives us Karitamen's tomb as an example of the latter, and his tomb contains this room:
I'm thinking that we could sponsor expeditions to Border Prince ruins so we can get all manner of books and scrolls, and maybe a small cut of the loot. Karitamen's pyramid in particular would be a good candidate. We get a number of journal entries from a guy who went all the way through the time, only turning back in Karitamen's burial chamber itself, so we could know about it. There's also a rosetta's stone just outside the pyramid that has writing in Nehekharan, Classical, Eltharin, and Khazalid, which can be used to decode the writings inside the pyramid. We know the latter two languages, so we'd be able to read the scrolls within. (Maybe also Classical writings? If so, sending an expedition just to get that rosetta's stone would be worth it.)
Additionally, 14% of Border Prince's ruins are Dwarf. I'm not really sure how viable it is to go through them given dwarves tend to be touchy about it, but maybe it's ok if the adventurers are other dwarves?